Home > Discontinued >

Nitecore Concept 1 1800 Lumen EDC Flashlight
NITECORE Concept 1 1800 Lumen Compact EDC Flashlight

Click image to open expanded view

Price: $64.95

Quantity in Stock:(Out of Stock)

Availability: Currently Unavailable
Product Code: FL-NITE-C1

Add a Battery and Save*:
No Battery Added
1x Nitecore NL1835HP 3500mAh [Add $19.76]
1x NL1835HP + UI1 Charger [Add $26.95]

This product has been discontinued. Please see the MH12S for the recommended MH12S model!

NITECORE Concept 1 Flashlight

NITECORE is continuing to push the boundaries with the NITECORE Concept 1, the first release in the new Concept Series. Featuring a premium CREE XHP35 HD E2 LED for a super bright 1800 lumens max output, the C1 is easily the top of its size class. A conveniently located single side switch control lets users adjust through 5 brightness settings and two selectable operating modes give a choice between direct access to Turbo or Strobe.

Operating on 1x IMR18650 battery (recommended) or 2x CR123A batteries, the C1 offers up to 300 hours of runtime on low and up to 30 minutes on Turbo. The compact 4.39" body tube weighs under 3 ounces without a battery making this flashlight perfect for everyday carry, travel and emergency backup.

Battery Note

The Concept 1 supports multiple battery options including button top & flat top IMR 18650 batteries. For optimal performance and to enable the full 1800 lumen output, we recommend using the NITECORE NL1835HP battery provided in the drop down option above (or here) which has a built-in protection circuit and an 8A output. The light will shut off at the maximum setting when using 2xCR123A or an 18650 battery with lower than 8A output.

NITECORE Concept 1 Specifications

  • Battery Type Supported: 1x IMR 18650 or 2x CR123A
  • Peak Beam Distance: 240 yards (219.45 meters)
  • Peak Beam Intensity: 12,100 cd
  • Brightness Outputs: (IMR 18650)
    • Turbo: 1800 lumens / 30 min
    • High: 810 lumens / 1h 30 min
    • Medium: 300 lumens / 4h
    • Low: 80 lumens / 15h
    • Ultralow: 1 lumen / 300h
  • Brightness Outputs: (2x CR123A)
    • High: 810 lumens / 1h 15 min
    • Medium: 300 lumens / 3h 30 min
    • Low: 80 lumens / 13h
    • Ultralow: 1 lumen / 200h
  • Weight (without battery): 2.18 ounces (61.9 grams)
  • Dimensions: 4.39in (111.5mm) x 0.96in (24.38mm) x 0.94in (23.87mm)

NITECORE Concept 1 Features

  • Utilizes a CREE XHP35 HD E2 LED, max output of up to 1800 lumens
  • Max beam intensity of up to 12,100cd, max distance of up to 220 meters
  • Crystal Coating Technology combined with “Precision Digital Optics Technology” for extreme reflector performance
  • Max runtime of up to 300 hours
  • Side switch for 5 brightness levels and 3 special functions
  • Integrated power indicator beneath the side switch displays remaining battery power (Patent No.: ZL201220057767.4 )
  • Power indicator blinks to report battery voltage to the nearest 0.1V
  • Features intelligent memory function (except for SOS and location beacon modes)
  • High efficient constant current circuit board provides constant illumination
  • The built in ATR module automatically regulates its output and adapts to the ambient environment, maintaining optimal performance.
  • Reverse polarity protection
  • Toughened ultra-clear mineral glass with anti-reflective coating
  • Magnetic tail cap with stand capability
  • Constructed from aero grade aluminum alloy with HAIII military grade hard-anodized finish
  • Waterproof in accordance to IPX-8 (two meters submersible)
  • Impact resistant to 1.5 meters


Turn on ─ When the light is in the standby status:
  1. Press and hold down the side switch until the light is turned on to the memorized brightness
  2. Tap the side switch twice quickly to activate the ultra-low brightness
  3. Tap the side switch three times quickly to enter Turbo in General mode or enter Strobe in Tactical mode
Turn off ─ With the light on, tap the side switch once to turn it off & go back to the standby status.
Brightness Selection ─ 5 brightness levels are available. When the light is in standby status, hold down the side switch until the light enters the memorized brightness level from last time. Continue to hold down the switch to cycle through “Ultralow-low-mid-high-turbo”. Release the switch to select and memorize the current brightness level. To reselect brightness level, tap the switch once to turn off the light and hold down the switch to cycle through 5 brightness levels.
Special Mode (Strobe/SOS/Beacon) ─ To enter the strobe mode:
  • When in standby status of tactical mode, quickly tap the switch 3 times
  • When in any illumination status, quickly tap the switch 3 times
  • ─ In the strobe mode, hold the switch for over 1 second to enter SOS mode; and then release and hold the switch for over 1 second to enter beacon mode.
    ─ Repeat the same operation to cycle through “strobe-SOS-beacon”.
    ─To exit the special modes, simply tap the switch once to turn off the light and enter standby.

NOTE: When the product is not in use, always loosen the tail cap to prevent accidental activation.

Package Contents: Nitecore Concept 1 flashlight, holster, pocket clip, lanyard, spare O-ring, instruction manual and warranty card
Nitecore Concept 1 Overview
Average Rating: Average Rating: 4.5 of 5 4.5 of 5 Total Reviews: 24 Write a review »

  1 of 1 people found the following review helpful:
4 of 5 Great flashlight March 23, 2021
Reviewer: John Shields from Connecticut hester, CT United States  
Great flashlight, fussy switch.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
5 of 5 Concept 1Con February 3, 2020
Reviewer: Mark from Houston, Texas  
I have had this Concept 1 for over a year and it overall is a reliable great small light with a lot of illumination punch.   Of a caution note,  it will burn a hole right through your pocket if accidently turned on!

Was this review helpful to you?

  1 of 1 people found the following review helpful:
2 of 5 nice size, good light, electronic unreliable December 20, 2018
Reviewer: Paul papaulu from Florence, OR United States  
I like the light.  Very compact with good throw of light.  A couple if things I do not like.

When I switch to tactical mode, the light will sometimes stop working entirely.  Even if I switch back to general mode or take out and re-install the battery, it doesn't work.   The only way I have been able to fix this is to put is a different battery.  What is weird is that if I charge the original battery, even a few minutes, and put it back in the light, the light starts working again.  

My concern that if the light craps out when i am out in the woods, that is not acceptable.

I have had issues in the past on two other NC lights with their electronics, but not right out of the box like this one.

The other thing to be aware of is you need to unscrew the cap a bit  or it will turn on in pocket or bag.  I often do not have a free hand when I put the light away so makes it difficult to manage.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
5 of 5 Love this light. October 10, 2018
Reviewer: Mark from Midwest  
It's more compact than I realized when looking at the pictures. Fits in a pocket nicely. Great beam intensity and so powerful for its size.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
5 of 5 Concept 1 is amazing! February 20, 2018
Reviewer: Dj from NY  
Brilliant design and engineering!  Performance is well above what one might expect from similar sized lights.  Operation is easy and instructions are detailed and well written/displayed.  Just perfect, just Notecore!

Was this review helpful to you?

View All Customer Reviews